/* =============================================
   Art Gallery Page Styles
   ============================================= */

.art-page {
    background: var(--bg-dark);
}

/* Art Hero */
.art-hero {
    max-width: 1400px;
    margin: 0 auto;
    padding: 140px 2.5rem 3rem;
}

.art-title {
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out both;
}

.art-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

/* Filter Buttons */
.art-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.filter-btn {
    padding: 0.6rem 1.25rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-dark);
}

/* Gallery Grid */
.art-gallery {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 2.5rem 4rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

/* Art Item */
.art-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.art-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.art-item.large {
    grid-column: span 2;
}

.art-item.hidden {
    display: none;
}

.art-image {
    position: relative;
    aspect-ratio: 4/3;
    background: var(--bg-secondary);
    overflow: hidden;
}

.art-item.large .art-image {
    aspect-ratio: 16/9;
}

.art-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.art-item:hover .art-image img {
    transform: scale(1.05);
}

.art-info {
    padding: 1rem 0.25rem;
}

.art-info h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.art-category {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==================== LIGHTBOX ==================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.lightbox-container {
    position: relative;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.lightbox.active .lightbox-container {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.lightbox-content {
    position: relative;
    max-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border-radius: 8px;
}


/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .art-item.large {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .art-hero {
        padding: 120px 1.25rem 2rem;
    }

    .art-title {
        font-size: 2rem;
    }

    .art-description {
        font-size: 1rem;
    }

    .art-gallery {
        padding: 1.5rem 1.25rem 3rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .art-item.large {
        grid-column: span 1;
    }

    .art-item.large .art-image {
        aspect-ratio: 4/3;
    }

    .lightbox-close {
        top: -45px;
    }
}

@media (max-width: 480px) {
    .art-title {
        font-size: 1.75rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}